<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="content-type" content="text/html; charset=utf-8" />
        <title>Drag Zoom with Visual Control</title>
        <script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?v=3&amp;sensor=false"></script>
        </script>
        <script type="text/javascript">
         document.write('<script type="text/javascript" src="../src/keydragzoom'+(document.location.search.indexOf('packed')>-1?'_packed':'')+'.js"><'+'/script>');
        </script>
        <script type="text/javascript">
        var map;
        function init() {
          var myOptions = {
            zoom: 13,
            center: new google.maps.LatLng(49.2903, -123.1294),
            mapTypeId: google.maps.MapTypeId.ROADMAP
          }
          map = new google.maps.Map(document.getElementById("map"), myOptions);

          map.enableKeyDragZoom({
            visualEnabled: true,
            visualPosition: google.maps.ControlPosition.LEFT,
            visualPositionOffset: new google.maps.Size(35, 0),
            visualPositionIndex: null,
            visualSprite: "http://maps.gstatic.com/mapfiles/ftr/controls/dragzoom_btn.png",
            visualSize: new google.maps.Size(20, 20),
            visualTips: {
             off: "Turn on",
             on: "Turn off"
            }
         });
        }
        </script>

<style>
#map {
width: 700px;
height: 500px;
}
</style>

    </head>
    <body onload="init()">
       <a href='?packed'>Packed</a> | <a href='?'>Unpacked</a> Version of the script.

       <br />
       Hold down the <span style="color: red; font-weight: bold;" >Shift</span> key while dragging a box or use the visual control below the zoom control to turn drag zoom on and off.

       <div id="map" style="border: 2px solid black;"></div>

    </body>
</html>